Locomotive draft-regulator.



PATENTED MAY 12, 1908. 'W. A. SKINNER dz T. F. GAIN..

LOGOMOTIVE DRAFT REGULATOR. 1

APPLIGATIN FILED AUG. 24:,1907. 2 SHEETS-SHEET 1.

19M" mono PATENTBD MAY 12, 1908.

2 SHEETS-SHEET 2" W. A, SKINNER & T. F. GAIN. LOOOMOTIVE DRAFT REGULATOR.

APPLIUATION FILED'AUG.Z4,1907.

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\\'.\ lllljli A. SKINNER, OF MOBERLY, AND THOMAS F. GAIN, OF MONTGOMERY GIT). i85 1." til.

LOCOMOTIVE DRAFT-REGULATOR.

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Specification of Letters Patent.

Patented May 12, 1908.

Application filed August 2%, 1907. Serial No. 390,0 60.

naces, and the invention has for its primary. ob ect an improved locomotive draft rogu lator which will distribute the heat from the furnace or fire-box evenly through the. flues of the boiler, thereby effecting the generation of steam very quickly and at a lower degree of heat in the lire-box, doing away with the necessity of a fierce or excessive fire to heat several lines owing to the fact that the products of combustion pass through only several ilues, and thereby effecting economies in the consumption of the solid or liquid fuel employed, as well resulting in lengthening the life of the boiler fines, for the reason that each flue will accomplish its required work with the fire lower than would otherwisebe the case, and in other economic advantages. With this and other"objects in view, as will more fully appear-as the description proceeds, the invention consists in certain constructions, arrangements, and combinations of the parts that we will hereinafter fully describe and then point out the novel features in the appended claims.

For afull understanding of the invention, reference is to be had to the following drawings, in which:

Figure 1 is a longitudinal sectional view'of a locomotive ,boiler furnace equipped with our I invention; Fig. 2 is a transverse sectional view thereof on the line 2-2 of Fig. -1; Fig. 3 is a similar view on the line 33 of Fig. 1; and Fig. 4 is a detail perspective View of the draft pipe.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters. Referring to the drawings, the numeral 1 designates the smoke-box or front end of a haust nozzle, 4 the flue sheet, and '5 the fines.

In carrying out our invention, we mount 21the stack thereof, 3 the exwithin the smoke-box, a funnel 6 Willi its smaller end or apex contiguous to the flue sheet. The said funnel 6 is held in a sub- .stantially horizontal position and substantially concentrically of the smoke-box and spaced from the walls thereof, by means of braces or metallic straps 7, as clearly illustrated in the drawings.

The exhaust nozzle 3 projects upwardly into the funnel 6 and terminates preferably at about the center of the funnel, considered vertically. The draft pipe 8 extends downinto the funnel 6' wardly from the stack 2 above and preferably in concentric relation with. the exhaust nozzle 3, being preferably spaced, as a whole, from the tip thereof. Forming practically a part thereof, or an extension of, the draft pipe 8, is a thimble 9 which is preferably provided with a flared lower end as shownand which is secured for a vertical adjustment within the lower end of the pipe 8 by means of the ordinary vertical slot and bolt connection 10.

A door or damper 11 is hinged at its lower edge, preferably to the outer side of the draft pipe 8 and-is designed to extend upwardly within the said pipe so as to serve as a cloT sure for an opening formed in the rear side of the latter. Thesaid damper 1.1 is so hinged as to have a tendency to fall by its own weight across the line or passage formed by the pipe 8 so as to contract or obstruct such passage while the same "time affording a direct communication between the stack and the smoke-box. v

12 designates screens of wire mesh or the like designed to piyhvent sparks from being thrown out. I l I f f l I In the practical operationof our improved draft regulating apparatus, when the locomotive 18 running, the exhaust steam issuing from the nozzle 3 and up through the draft pipeS and out of the smoke stack .2 will produce a forced draft embodying'as a'feature the suction of the products of combustion around the outer edge of the funnel 6 and.

into the latter, and as a consequence, the

The force draft will be evenly distributed. of the steam passing upwardly through the draft pipe 8 will tend to hold the'daniper 11 in closed position, thereby cutting off all direct communication between the stack and the fines, l/Vhen the locomotive is not running and is therefore not exhausting up the stack 2, the damper 11 will fall inwardly of its own weight and thereby establish direct ably, as shown,

communication between the fines and the smoke stack and afford effective natural draft, the smoke and other products of combustion passing upwardly through the opening in the draft pipe instead of being compelled to pursue a more circuitous course around and into the funnel 6 as they are forced to do when forced draft is maintained.

Thus the engine is afforded an efficient mat-4 and draftwhen it is not working and the steam may be quickly generated when the fire is started, as in a round-house, doing "away with the great annoyance to the enginemen of having heat and smoke leak ng out around the fire-door into the cab. Prefer- 1 1 is higher than the highest row of flues and considerably higher than the fire-door inthe engine cab.

By means of the vertical adjustment to which the thimble 9 is susceptible, the latter I may be raised or lowered so ast'o regulate the force of the draft. v

It is obvious that with a smoke-box or front end constructed in accordance with our eated at about the middle thereof, it is obv"ions that the invention is equally applicable to those cases where the said stack and pipe are set back nearer to the flue sheet, orforwardly at a greater distance from said sheet,

the only changes being necessary, if'any, consisting in slightly altering the shape of the funnel.

Having'thus described the invention, what is claimed as new is:

1. In a locomotive boiler furnace, the combination with the smoke-box, exhaust nozzle, smoke stack, and draft pipe cxtendifigdown- -wardly from the smoke stack into the smoke- I furnace, and

box, of a funnel supported within the smokebox with its open end foremost, the upper end of the exhaust nozzle and the lower end of the draft pipe projecting into said funnel.

2. The combination in a locomotive boiler with the smoke-box, smoke stack, and exhaust nozzle thereof, of a funnel held in a horizontal position within the the top of the damper or door smoke-box With its larger open end foremost, said funnel being s aced on all sides from the walls of the smo e-box, the exhaust noz: zle and draft pipeprojectin into the funnel.

3. In a locomotive boiler i'nace, the com-v bination with the smoke-box, stack, and exhaust nozzle, of a funnel SliFPOIlLQd in the smoke-box with its open en foremost, the

exhaust nozzle projecting into the funnel,

and a draft .pipe extending downwardly from the stack into the funnel and above the tip of the exhaust nozzle, said draft pipe being provided with an extensible lower end.

4. In a locomotive boiler'furnace, the combination with the smoke-box, stack, and exhaust nozzle, of a funnel su ported in the smoke-box with its open end foremost, the exhaust nozzle projecting into the funnel, a draft pipe extending downwardly from the stack and ihto the funnel above the ti of'the exhaust nozzle, and a flared thimb e con-- nectedito the lower end of said draft pipe.

5. In a locomotive boiler furnace, the combination with the smoke-box, stack, and exhaust nozzle, of a funnel supported in the smoke-box with' its open end foremost, the exhaust nozzle projecting into the funnel, a draft pipe extending downwardly from the stack into the funnel, and a damperinsaid draft pipe outside of said funnel.

6. In a locomotive boiler furnace, the combination with the smoke-box, stack, and exhaust .nozzle,' of a funnel supported in the smoke-box with its open foremost, the exhaust nozzleprojecting into the funnel, a draft pipe extendin downwardly from the stack into the funnel above' the'exhaust nozzle, said pipe being formed, outside of the I funnel, with an opening, and a'damper hinged to'the draft pipe at the said opening and arranged to fall inwardlytherefrom.

7. In a locomotive boiler furnace, the "cornblnatlon wlth a smoke-box, exhaust nozzle,

and smoke stack, of a funnel supported within the smoke-box with its open endforemost,

the upper end of the exhaust nozzle project-' ing into said funnel and there being rovided a passage from the interior of the funnel to the smoke stack above said nozzle.

In testimony whereof we affix our tures in resence of two witnesses.

Vi ALTER A, SKINNER. THOMAS F. CAIN. Witnesses: Ms. S. MOPINE,

Roar; W. HoPKINs.

signa- 

